Another interesting result obtained from the \(M(H)\)  curve is the large \(H_C\)  \(\simeq \)  32 kOe, comparable to those of other DPs of interest for hard magnets [1]}, [2]}, and much larger than that reported for LCCIO [3]}. Previous studies of chemical pressure on La\(_{1.5}A_{0.5}\) CoMnO\(_6\)  (\(A\)  = Ba, Ca, Sr) report the increase of \(H_C\)  with the decrease of the average \(A\) -site ionic radius, ascribed to the enhancement of the orbital contribution to the magnetic moments caused by the increased lattice distortion [4]}. Conversely, a recent investigation of hydrostatic pressure on \(A_2\) FeReO\(_6\)  (\(A\)  = Ba, Ca) has shown a dramatic increase of \(H_C\)  attributed to pressure-induced changes in the crystal field rather than in the orbital moment [5]}. For \(A_2\) NiIrO\(_6\)  (\(A\)  = La-Lu), a systematic increase of \(H_C\)  and \(T_C\)  was observed with decreasing the unit cell volume, ascribed to the enhanced Ni \(e_g\) -Ir \(t_{2g}\)  orbital hybridization due to lattice distortion [1]}. In our case, the great increase in the \(H_C\)  of LCCFIO with respect to that of LCCIO is certainly not related to the orbital moment of 3\(d^5\)  Fe\(^{3+}\)  inserted in the system, presumably negligible, but probably to its spin moment and also to the larger structural distortion of the former compound in comparison to the later one, which signifies stronger \(t_{2g}\) -\(t_{2g}\)  orbital hybridization.
